I bought this used about three months ago. Zen Select in perfect operational condition. Dead quiet and not an ounce of hum. Unmodified as close as I can tell. The bottom was missing a few screws, so they were replaced, but with non-matching ones. The bottom is really scratched. Quite a large scratch on the faceplate and a shiny spot on the top. I do not have the original shipping box, but it will be packaged well.$375 includes shipping to anywhere in the lower 48. Paypal only please. I'll even pick up the fee. Included are a set of stock tubes, which play fine, but how many hours on them, I'm not sure. I'll also toss in a NOS RCA rectifier that I really liked in this amp.